Toothbrush



FIG. 1 is a perspective view of the toothbrush embodying the new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The broken line showing of bristles is included for the purpose of illustrating portions of the toothbrush that form no part of the claimed design. 

The ornamental design for a toothbrush, as shown and described. 